Printing head and printing apparatus using same

Details Printing head and printing apparatus using same Printing head and printing apparatus using same

1995-07-28

2000-04-25

Paschall, Mark

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219501, 219216PH, 327 95, H05B 102

Patent

active

060546891

ABSTRACT:
Heating elements and logic circuits are provided on the base board of a printing head, and noise inhibiting circuit having a hysteresis characteristic are provided between the logic circuits and the input terminals of the base board. The base board, heating elements, logic circuits and noise inhibiting circuits are fabricated by a semiconductor manufacturing process. Each noise inhibiting circuit applies an input signal that enters from an input pad to first and second gates constituted by two MOSFETs having threshold potentials that differ from each other. A flip-flop circuit set or rest by the outputs of the first and second gates is provided on the output side. The noise inhibiting circuit having the hysteresis characteristic is constructed between the threshold potential of the first gate and the threshold potential of the second gate.

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